Chem. Eng. Thermodynamics(TKK-2137)

14/15 Semester 3

Instructor: Rama OktavianEmail: rama.oktavian86@gmail.comOffice Hr.: M.13-15, Tu. 13-15, W. 13-15, Th. 13-15, F. 09-11

Refrigeration cycle

Applications:

1. the manufacture of ice and the dehydration of gases

2. gas liquefaction

3. Air separation unit

4. Ammonia processing

Refrigeration cycle

Refrigeration ≡ transfer of heat from a cold to hot temperature region

Circulating fluid ≡ refrigerant

NET

CREF W

Q

POWER

RATECOOLINGCOP

Refrigeration cycle

Carnot refrigerator – reverse of Carnot engine

NET

CREF W

Q

POWER

RATECOOLINGCOP

Refrigeration cycle

Vapor compression cycle

1 2 A liquid evaporating at constant pressure

2 3 the actual compression process

3 4 condensation process at constant pressure

4 1 throttling process

Refrigeration cycle

Vapor compression cycle configuration